Summit Leadership

Leading the NAIIS

TAN-Headshot-June-2013-Color-smlL.J TAN, MS, PhD

Dr. L.J Tan is the Chief Strategy Officer for the Immunization Action Coalition, which he joined in January 2013. There, L.J is leading the IAC’s new strategic direction on national immunization advocacy and policy development. Prior to that, L.J was the Director of Medicine and Public Health at the American Medical Association (AMA) for 15 years, where he led multiple AMA efforts in immunizations and infectious diseases, prevention and health promotion, aging and community health, and eliminating healthcare disparities and improving the health of physicians.

Dr. Tan received his PhD in Immunology/Microbiology from Northwestern University Medical School, and completed a postdoctoral fellowship in Molecular Immunology at the University of Chicago Hospitals.

Dr. Tan was recently elected onto the National Quality Forum’s Adult Immunizations Expert Committee, onto the European Society of Clinical Microbiology and Infectious Diseases Vaccine Study Group (EVASG), and serves as an editor for BMC Infectious Diseases.

He just completed his term as an elected member of the federal National Vaccine Advisory Committee (NVAC). He still serves on the NVAC’s HPV, Vaccine Confidence, and Maternal Immunization working groups. Previously, L.J chaired the Immunization Infrastructure Working Group and also served on the vaccine safety Workgin.

Dr. Tan has also served as a member of the federal Advisory Committee for Immunization Practices (ACIP), and he still serves on the Adult Immunization working group. Previously, L.J also served on the influenza, zoster, and evidence-based working groups.

Dr. Tan co-founded (with the CDC and the NVPO) and currently co-chairs the National Adult and Influenza Immunization Summit, and founded and organized the first National Immunization Congress in 2007, and organized the Second National Immunization Congress in 2010. He served as a primary consultant for the first European Union Influenza Summit in 2011, and the first Asian Pacific Influenza Summit in 2012, and continues to advise those bodies.

He serves or has served on the Steering Committees for the 317 Coalition, the National Network for Immunization Information (NNii), the Partnership to End Cervical Cancer, the National Viral Hepatitis Roundtable, and the Scientific Advisory Boards for the Immunization Action Coalition and Coalition for Safe Community Needle Disposal.

L.J is a member of numerous professional organizations including the American Public Health Association, the Federation of American Societies for Experimental Biology, the American Society of Microbiology, the American Association of Immunologists, the National Council of Asian & Pacific Islander Physicians, and the Infectious Diseases Society of America.


Dr. Carolyn Bridges is the Associate Director of Adult Immunizations in the Immunization Services Division, National Center for Immunization and Respiratory Diseases at the Centers for Disease Control and Prevention (CDC). A board-certified internal medicine physician, Dr. Bridges was in clinical practice before joining the CDC as an Epidemic Intelligence Service Officer in 1996 working primarily on influenza. She has held a number of different positions at CDC working on influenza and other vaccine preventable diseases and transitioned to her current position in 2011 as the Associate Director of Adult Immunizations.

Her career in public health has included research and policy on influenza prevention and control, vaccine effectiveness, and transmission, and improving coverage for recommended adult vaccines. Her current focus is on increasing the evidence base for adult vaccinations, vaccine coverage assessment, and adult vaccination policy and education.

Dr. Bridges has authored or co-authored over 100 articles and book chapters.


Dr. Bruce Gellin is the Deputy Assistant Secretary for Health and Director of the National Vaccine Program Office (NVPO). NVPO was created by Congress to provide leadership and coordination among Federal agencies and other immunization stakeholders, including states and municipalities, health care providers, and private-sector entities such as vaccine manufacturers.

Before joining NVPO in 2002, Dr. Gellin was the director of the National Network for Immunization Information, an organization he founded to be a resource of up-to-date, authoritative information about vaccines and immunizations.

Dr. Gellin has had broad experience in public health aspects of infectious diseases and has held positions at the National Institute of Allergy and Infectious Diseases (NIH), the Centers for Disease Control and Prevention (CDC), the Rockefeller Foundation, and Johns Hopkins University School of Public Health. In addition, he has been a regular consultant to the World Health Organization. He is board certified in internal medicine and infectious diseases and is currently on the faculty at George Washington University School of Medicine and Vanderbilt University Schools of Medicine and Nursing.

Dr. Gellin is a graduate of the University of North Carolina (Morehead Scholar), Cornell University Medical College, and the Columbia University School of Public Health, is an infectious disease expert with training in epidemiology. He has written extensively about public health aspects of infectious diseases in medical and non-medical texts and the peer reviewed medical literature and also served as a medical advisor to Encyclopedia Britannica.